package jdbc;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.sql.Statement;

/**
 * 执行DML语句
 */
public class JDBCDemo2 {
    public static void main(String[] args) {
        try {
            Class.forName("com.mysql.cj.jdbc.Driver");
            Connection connection = DriverManager.getConnection(
                    //   jdbc:mysql://数据库IP:端口/数据库名?参数...
                    "jdbc:mysql://localhost:3306/tedu?characterEncoding=utf8&useSSL=false&serverTimezone=Asia/Shanghai&rewriteBatchedStatements=true",
                    "root",
                    "root"
            );
            System.out.println("成功连接数据库");
            Statement statement = connection.createStatement();
            /*
                INSERT INTO userinfo(username,password,nickname,age)
                VALUES('张三','123456','阿三',22)
             */
            String sql = "INSERT INTO userinfo(username,password,nickname,age) " +
                         "VALUES('张三','123456','阿三',22) ";
            /*
                Statement有专门用于执行DML语句的方法:
                int executeUpdate(String sql)
                方法返回值表示执行SQL后影响了表中多少条记录
             */
            int num = statement.executeUpdate(sql);
            if(num>0){
                System.out.println("插入成功");
            }
           connection.close();
        } catch (ClassNotFoundException | SQLException e) {
            e.printStackTrace();
        }
    }
}
